--------------------------------------------------------- NSSDC Master Catalog Display Experiment --------------------------------------------------------- Ultraviolet Photometry NSSDC ID: 72-012A-06 Mission Name: Pioneer 10 Principal Investigator: Judge Description This experiment (on both Pioneers 10 and 11) consisted of a broadband photometer sensitive between 200 and 800 A. During the cruise phase of the mission, this experiment was used to search for the supersonic-to-subsonic transition region in the solar wind. During the Jovian encounter, this experiment was used to look for evidence of an auroral oval on the Jovian dayside, to find the ratio of hydrogen to helium in the Jovian atmosphere, and to find the temperature of the outer portion of the Jovian atmosphere. Evidence of helium was found in the interplanetary region indicating interactions between charged particles and neutral hydrogen. Since October 1990 the instrument exhibited a degraded charge capacity which necessitated limitation of operations to no more than two days per week thereafter. ------------------- Discipline(s) Astronomy/Ultraviolet Planetary Science/Atmospheres Space Physics/Heliospheric Studies Space Physics/Ionospheric Studies --------------------------------------------------------- NSSDC Master Catalog Display Experiment Personnel --------------------------------------------------------- Ultraviolet Photometry NSSDC ID: 72-012A-06 Principal Investigator Dr. Darrell L. Judge Space Sciences Center, SHS 274 University of Southern California University Park Los Angeles, CA 90089 ----- Other Investigator Dr. Robert W. Carlson Mail Stop 183-601 Jet Propulsion Laboratory 4800 Oak Grove Drive Pasadena, CA 91109 Electronic Mail RCARLSON@ISSAC.JPL.NASA.GOV (INTERNET) ----- Dr. Pradip Gangopadhyay Space Sciences Center, SHS 274 University of Southern California University Park-MC 1341 Los Angeles, CA 90089-1341 ----- NSSDC Contact Dr. John F. Cooper GSFC-Code 632 Electronic Mail JCOOPER@NSSDCA.GSFC.NASA.GOV (INTERNET) NCF::JCOOPER (NSI/DECNET) ----- --------------------------------------------------------------------------- For questions about this experiment, please contact: Dr. John F. Cooper, jcooper@nssdca.gsfc.nasa.gov, (301)286-1193 GSFC-Code 632 For questions about the NSSDC's information systems, please contact: Dr. James Thieman, thieman@nssdca.gsfc.nasa.gov, (301)286-9790 National Space Science Data Center, Code 633.2 NASA/Goddard Space Flight Center, Greenbelt, MD 20771 --------------------------------------------------------------------------- NASA Official: J. H. King, king@nssdca.gsfc.nasa.gov Last Updated: 1996-06-05 Output Generated: 1996-09-24 Programming by: E. V. Bell, II